Tool-holder.



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Patented Lozzzls'BoZey.

L. BOLEY.

TOOL HOLDER.

APPLIOATION FILED rnn.n1,1eos.

LOUIS BOLEY, OF OHIO CITY, OHIO.

TOOL-HOLDER.

Application led February 21, 1908.

Specification of Letters atent.

Patented Nov. 3, 1908.

Serial N0. 417,095.

To all whom it may concern:

Be it known that I, LOUIS BoLEY, a citizen of the United States oi' America, residing at Ohio City, in the county of Van Wert and State of Ohio, have invented new and useful Improvements in Tool-Holders, of which the following is a speciiication.

This invention relates to tool holders for grindstones, and one of the principal objects of the same is to provide simple and reliable means for holding chisels, plane bits, drawing knives and other tools in adjusted positions upon the face of a ,irindstone so that the required bevel will e given to the cutting edge.

Another object of the invention is to provide simple adjustable means for holding various tools to a grindstone so that the reuired bevel is Jformed on the cuttin edge of t e tool, while one or both hands o? the operator are free to turn the grindstone.

These and other objects may be attained by means of the construction illustrated in the accompanying drawing, in which,-

Fi ure 1 is a side elevation of a grindstone, showing my adjustable tool holder in place on the grindstone frame, the tool holder being shown in section. Fig. 2 is an end view of the same. Fig. 3 is a detail view of a modiiied form of extensible or ad'ustable tool holding frame. Fig. 4 is a detail view of the set screw for holding the telescopic members of the adjustable frame in position. Fig. 5 is a detail section showing the supporting device for the tool holder frame.

Referring to the drawing for a more specie description of my invention, the numeral 1 designates the grindstone, and 2 is the frame in which the stone is mounted, and 3 are the legs of the frame. The grindstone is provided with a suitable axle 4 which is journaled at opposite sides in a keeper 5 secured to the frame of the grindstone. A crank handle may be used for turning the grindstone.

Suitably mounted in a keeper 6 having a removable upper member 7 is a oke 8, said yoke consisting of a connecting ar 9 which 1s mounted in the keeper 6 and held in place by means of the screws 10. The arms of the yoke 8 are at their upper ends rabbeted, as at 11, and secured to said rabbeted ends are the members 12, pivoted at 13 to the arms of the yoke 8. The rabbeted ends thus form stop shoulders 13 for a purpose to be hereinafter described. The members 12 are rovided with a tool holder 14, said tool ho der being connected to the members 12 by means of set screws 15 and said tool holder being provided with a suitable slot 16 for a plane bit or other blade which is held in place by means of a set screw 17.

The o eration of my invention may be briefly escribed as follows The bit or other suitable tool to be ground is placed in the slot 16, and the set screw 17 is made to engage the same. The tool holder 14 is tipped toward the stone or away from the same to the required degree to give the necessary bevel to the tool, and when this point has been determined the nuts on the screws 13 are tightened up to hold the frame in the re uired position.

s shown in Fig. 3, the yoke bars 8 are connected by a rod 9EL and provided with a set screw 12a. This construction permits of the lateral movement of the tool holder and means whereby the same may be held in adjusted ositions.

Bj; tlie provision of the stop shoulders, it is o vious that the members 12 may be swung on the bolts 13 and moved rearwardl of the grind stone and their movement will be limited by their engagement with the said stop shoulders in order that the tool holder can be held stationary during the operation of inserting a tool to be operated upon by the grind stone.

From the fore oing it will be obvious that a tool holder ma ein accordance with my i11- vention will hold a tool to a grindstone in the required position to give the necessary bevel to the tool, and at the same time the hands, or at least one of them, is free to turn the grindstone. My tool holder produces excellent work in cases where accuracy is a desideratum.

Having thus described the invention, what is claimed as new, is

A grind stone having a supporting frame and a keeper mounted upon said frame, in combination with a yoke comprising parallel spaced arms connected at their lower ends by a connecting' bar, said connecting bar being mounted in the said keeper for rotary movement so that the arms can be moved toward or away from the grind stone, said arms having rabbeted upper ends to form sto shoulders, parallel spaced members, c amping bolts engaged with the parallel spaced members and with the rabbeted ends of the arms respectively for holding the members in their adjusted position, said members being adapt ed to engage the stop shoulders upon the arms to limit the downward movement ofthe said members, and e tool holder removably mounted at its ends to the arms.

In testimony whereof I affix my signature 1n presence ol two witnesses.

LON UMBAUGH,y GEO. L. MOORE. 

